38 years ago today, on May 17th, 1987 (April 20th, 1987 in the lunar calendar), China's first polar research ship returned to Qingdao. On May 17, 1987, China's first polar research ship returned to Qingdao. China's first polar scientific research ship "Polar" returned to Qingdao safely on May 17, 1987 after successfully completing its mission. This research ship set sail from Qingdao on October 31, 1986, carrying members of my country's third Antarctic scientific expedition. After 199 days of actual investigation, the total voyage was 30,921 nautical miles.